I always buy using EBay, AliExpress or Paypal. That way I can chase up any problems, whether unsatisfactory items or outright failure to deliver. I have a zero tolerance approach to being blatantly cheated. Paypal basically equals a six month warranty, whether the item came from abroad or not.

That said, if I buy something knowing it’s going to be junk and planning to dismantle it for parts or something, I don’t chase the seller up on the basis that it’s junk. The classic BLF example: a light you buy knowing it’ll have a Latticebright LED in it because you want the body for a host.

I also don’t bother chasing up cases where I get 9 parts instead of the quoted 10 in a pack, as long as the missing part’s only worth a few pence. The flip side is that I quietly keep the extra part when I get 11. What goes around comes around in that case.